His personal trainer is a real bitch and he has had enough of her dominant attitude! He enslaves her with a ball gag and a leather collar with a leash attached to it and makes her do all kinds of gym exercises under close supervision.
The gagged girl is exhausted from the various fitness tasks he makes her do, but he shows her no mercy. The bitch is finally tied down on a weight-lifting bench and tied to it with her own stinky gym shoe tied to her face!